Treadle-motor.



PATENTED FEB. 26, 1907.

U; STAMBOIS. TREADLE MOTOR.

APPLICATION rum) MAR. 28. 1995,.

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PATBNTED FEB. 26, 1907.

G. STAMBOIS. TREADLE MOTOR. APPLICATION FILED MAR. 28, 1905.

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UNITED STATES PATENT OFFICE.

CHARLES STAMBOIS, OF NEWCASTLEUPONTYNE, ENGLAND, ASSIGNOR OF ONE-TWENTIETH TO STEVEN A. ALMIDA, OF CHICAGO, ILLINOIS, AND ONE-TENTH TO LOUIS HUB-ER, OF FRAUENFELD, SWITZERLAND.

'TREADLE-IVIOTOR.

Specification of Letters Patent.

Patented Feb. 26, 1907.

To a whom it may concern:

Be it known that I, CHARLES STAM-BOIS, a subject-0f the Itingof Great britain, resioing atN ewcastleupon'1yne, England, have invented certain new and useful Improvements in .lreadle-Motors; and .ldo .hereby declare that thefollowing is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it ap- 1 table with the shaft .2. .Mounted upon the This inventionrelates tonew and useful improvements in sawing-machines, and :re-

pertains to make anduse thesame.

lates particularly to the treadle mechanism therefor, whereby a continuous rotary movement is imparted to the main driving-shaft carrying the saw, said rotary movement being derived fromahinged treadle and interposed connections, all as hereinafter more fully described, and specifically pointed out in the claims.

The object of the invention is to avoid the dead-centers which are incident to crankshafts, and comprises a pivoted treadle with sprocket-wheels mounted upon a rotatable shaft, chains connected with the treadle and extending in opposite directions in engagement with said sprocket-wheels, with resilient means connecting the ends of said sprocket-chains with relatively fixed connections on the frame, together with suitable pawl-and-ratchet-connections, whereby one of said sprocket-wheels may be positively connected so as to drive said shaft, while the other is rotatable loosely thereupon.

Referring to the drawings, in which similar numerals of reference indicate corresponding parts in all the views, Figure 1 is a side elevational view of the machine. Fig. 2 is a plan view with the table removed. Fig. 3 is a plan view with the table in position. Fig. 4 is an end elevational view looking from the front end of the machine, parts being broken away for purposes of illustration. Fig. 5 is a fragmentary view showing part of the driving means in section; and Fig. 6 is a detached detail showing one of the sprockets, hereinafter referred to, mounted on the driving-shaft with the pawl and ratchet cooperating therewith.

Mounted in the frame 1 is a driving-shaft 2, onwhich shaft is rigidly connected the pinion 3. Loosely mounted on the shaft 2 are sprocket-wheels 4 and 5, one of which is shown in Fig. 6.. .On the sprocket-wheels 4 and .5 are carried ipawls 6, which by means of the springs 7 are held normally 111.611- gagement with the ratchets :8, which ratchets are mounted, upon or integral with hubs 9,

which are either keyed upon the shaft 2 or rigidly connected therewith by means of setscrews, as 10, so that the 'ratchets:8 are rotaframe .lisa treadle '11, comprisingthe two members 12 and 13, which are connected by means of the foot-plate 14 at the freeouter .end thereof.

.A sprocket-chain 14, connected at one :end to the treadle 13, passes upwardly over the .front faceof the sprocket 4 and extends rearwardly to a tension-spring 15, which latter is connected to a screw-rod 16, mounted in'a threaded bearing 17 and provided with .a hand-wheel 18 for conveniently adjusting the tension of said spring. A sprocket-chain 19, connected to the treadle 13, extends upwardly over the rear face of the sprocket 5 and extends forwardly to a tension-spring 20, which latter is connected to a screw-rod 21, mounted in a threaded bearing 22 and pro vided with a hand-wheel 23 for adjusting said spring. Carried by the shaft 2 and rigidly mounted thereupon is a gear 25, which meshes with a inion 26 on the saw-carrying shaft 27, on which shaft 27 is mounted the circular saw 28, said saw projecting above the table 29, as shown in 13 igs. 1 and 4. In mesh with the gear 3 on said shaft 2 is a larger gear 30, which is mounted on the stub-shaft 31, which stub-shaft carries a sprocket-w heel 32, about which is extended the sprocket-chain 33, which passes thence over and around the sprocket-wheel 34 on the shaft 35, which shaft 35 is provided with the crank-handles 36, as shown in Fig. 3, so that, if desired, the shaft 35, and through it the shaft 2, may be driven by means of said crank-handles instead of the treadle mechanism shown. It will be noted that by thus arranging the sprocket-chains 14 and 19, respectively, in engagement with the front and rear faces of their sprocket-wheels the tension exerted by the springs 15 and 20 on the drive-shaft 2 will tend to balance in all positions of the treadle, thereby obviating undue strain of the shaft in its bearings and preventing shocks occurring through lost motion upon reversals of the treadles moving.

In the operation of my invention the downward swing of the treadle will cause the shaft 2 to be rotated by the sprocket-chain 19 and wheel 5, while the upward movement of the treadle will cause a continuation of such rotation by the engagement of the sprocket chain 14 with the Wheel 4. The drive-shaft 2 is free to rotate under the action of the momentum of its parts and connections, while the treadle is held stationary.

From the above description it will be seen that my invention provides a construction capable of operating Without shock for transforming a reciprocatory or swinging motion into rotary motion.

Any suitable machine may be driven from the shaft 2, and it is to be understood that the invention is not to be limited in its application to sawing-machines.

Having described my invention, what I claim, and desire to secure by Letters Patent, is

1. In an apparatus of the character described, the combination of a driving-shaft, sprocket-wheels loosely mounted on said shaft, one-way clutches connecting said sprocket wheels and shaft, a treadle, sprocket-chains secured to said treadle and extending, respectively, into engagement 1 with opposite sides of said sprocket-Wheels l and tension-springs secured to the ends of I said chains, substantially as described.

2. In an apparatus of the character del scribed, the combination of a driving-shaft, ratchet-Wheels secured thereto, sprocketwheels loosely mounted on said shaft, pawls carried by said sprocket-wheels in engagement with said ratchet-wheels, a treadle, sprocket-chains secured to said treadle and extending, respectively, into engagement with opposite sides of said sprocket-wheels, tension-springs secured to the ends of said chains, and means for independently adjusting the tension of said several springs, substantially as described.

3. In an apparatus of the character described, the combination of a driving-shaft, a pair of ratchet-wheels secured thereto, a pair of sprocket-Wheels loosely mounted on said shaft, pawls carried by said sprocket-wheels in engagement with said ratchet-wheels, a treadle, a pair of sprocket-chains secured to said treadle and extending, respectively, into engagement with the front and rear faces of said sprocket-wheels, and tension-springs secured to the ends of said chains, substantially as described.

t In witness whereof I have hereunto set I my hand in the presence of two Witnesses.

CHARLES STAINLBOIS.

Witnesses:

FRED. H. GIBBs, JOHN F. DEUFFERWIEL. 

